Geomechanics and Engineering

  • 제21권4호
  • /
  • Pages.379-390
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  • 2020
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Behavior of a combined piled raft foundation in a multi-layered soil subjected to vertical loading

  • Bandyopadhyay, Srijit (Reactor Safety Division, Bhabha Atomic Research Centre) ;
  • Sengupta, Aniruddha (Department of Civil Engineering, Indian Institute of technology) ;
  • Parulekar, Y.M. (Reactor Safety Division, Bhabha Atomic Research Centre)
  • 투고 : 2019.03.27
  • 심사 : 2020.04.03
  • 발행 : 2020.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

The behavior of a piled raft system in multi-layered soil subjected to vertical loading has been studied numerically using 3D finite element analysis. Initially, the 3D finite element model has been validated by analytically simulating the field experiments conducted on vertically loaded instrumented piled raft. Subsequently, a comprehensive parametric study has been conducted to assess the performance of a combined piled raft system in terms of optimum pile spacing and settlement of raft and piles, in multi-layered soil stratum subjected to vertical loading. It has been found that a combined pile raft system can significantly reduce the total settlement as well as the differential settlement of the raft in comparison to the raft alone. Two different arrangements below the piled raft with the same pile numbers show a significant amount of increase of load transfer of piled raft system, which is in line with the load transfer mechanism of a piled raft. A methodology for the factor of safety assessment of a combined pile raft foundation has been presented to improve the performance of piled raft based on its serviceability requirements. The findings of this study could be used as guidelines for achieving economical design for combined piled raft systems.

키워드

과제정보

We thank the Editor-in-chief and three anonymous reviewers, whose comments/suggestions helped improve and clarify this manuscript. The technical support for modeling CPRF from Mr. Tarvinder Singh of BARC, Mumbai and Co researchers of IIT Kharagpur is gratefully acknowledged.

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